Curse of PredationCurse of Predation, Curse of OpulenceCurse of Opulence, Curse of Stalked PreyCurse of Stalked Prey, Curse of DisturbanceCurse of Disturbance, and more are all eligible for reclamation with this guy
A quick note on the banlist Magics Commander banned list updates on a roughly quarterly basis, and a handful of powerful fast-mana artifacts (the kind of free rocks that historically warped games) have moved on and off it
Doing any or all of these at instant speed can allow you to set up game-ending turns out of seemingly nowhere, and its all tacked onto a counterspell
There are Commander decks out there with few basics, so they have few options to fetch out when you use this, and this could have more value in those metagames
You can grab slivers like Winged Sliver or Crystalline Sliver to create advantages over your opponent
With that in mind, here's a full lowdown of everything you need to know about this enormous, wide-ranging set